Constraints on the varying electron mass and early dark energy in light of ACT DR6 and DESI DR2 and the implications for inflation

2025/08/12 by Toda, Yo, Seto, Osamu · 2 citations
#Cosmology and Nongalactic Astrophysics (astro-ph.CO) #FOS: Physical sciences #General Relativity and Quantum Cosmology (gr-qc) #High Energy Physics - Phenomenology (hep-ph)

paper · doi:10.48550/arxiv.2508.09025

Abstract

Primarily motivated by the Hubble tension, we analyze the varying electron mass model and axionlike early dark energy model (EDE) using baryon acoustic oscillation data from DESI DR2 data and including the recent results from ACT DR6. Our analysis indicates that m_e / m_e0 = 1.0081 ± 0.0046 and the energy fraction of EDE is constrained as f_EDE < 0.016. Since those cosmological models fit with different spectral index n_s, we show the posterior of those models on the (n_s-r) plane and point out that, for example, Starobinsky inflation works for varying electron mass model while the standard supersymmetric hybrid inflation is preferred in the EDE model.

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Cited by

• Dynamical Dark Energy Meets Varying Electron Mass: Implications for Phantom Crossing and the Hubble Constant
• Lensing amplitude anomaly and varying electron mass alleviate the Hubble and S₈ tensions

Related

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